ArticleFrontiers in fungal biology2026
Detection of TR34/L98H pan-azole-resistant
Article in Frontiers in fungal biology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Introduction: Poultry farms have been recognized as environments prone to fungal contamination. However, the occurrence of azole-resistant Aspergillus fumigatus and its cytotoxic potential remain insufficiently characterized. This study aimed to characterize the occurrence, cytotoxic potential, and azole-resistance profile ofAspergillus section Fumigati in poultry farms. Methods: A total of 420 samples, including air (n = 47), electrostatic dust cloths (n = 87), bedding (n = 87), feed (n = 95), swabs (n = 87), workers' masks (n = 2), and broiler breast (n = 15), were obtained. Fungal characterization was performed through culture-based methods (27 °C and 37 °C), followed by azole resistance screening according to EUCAST guidelines. Resistant isolates were subjected to whole-genome sequencing and a targeted analysis of cyp51A mutations. The cytotoxicity potential of fungal isolates and environmental samples was evaluated using selected cell lines representing respiratory organs (human alveolar [A549]) and detoxification organs (swinekidney [SK]/hepatocellular carcinoma [HepG2]). Results: Seven putative Aspergillus fumigatus isolates exhibited pan-azole resistance (MICs: ≥ 2 mg/L ITR/VOR; ≥ 1mg/L for POS). Four isolates carried the TR34/L98H mutation and were recovered from bedding (n = 3) and air (n = 1), suggesting the presence of resistant A. fumigatus in poultry farm matrices. Although 12% of isolates induced toxicity on both cell lines (17/145), no significant association was observed between isolate cytotoxicity and environmental sample toxicity, suggesting that additional biological and chemical components may contribute to the overall toxicological profile of farm environments. Discusion: The study highlights the occurrence of azole-resistant A. fumigatus in poultry farms and support integrated surveillance approaches addressing antifungal resistance and environmental exposure risks in poultry production.
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